Worked for a while then mysteriously went wrong

This plugin seemed simple and great to add that little extra security buffer to my site up until it mysteriously didn’t recognize my IP address today. I went to login to my WordPress site and it suddenly got stuck in a login loop without telling me the problem. When I discovered and accessed the email link to allow recognition of my IP address, it went to the site login again and got stuck in the same loop. I am so thankful for Bluehost support because if it weren’t for their help this could have been a lockout that would have taken many hours or even days to figure out. Also, when going to uninstall the plugin after deactivating it, there did not seem to be any option to change back the login web address and it is now stuck at the previously designated address. I gave it two stars because it did work for about 2 months.